Pressure-fluid motor



M. P. HOLMES PRESSURE FLUID MOTOR Original Filed June 27, 1918 III III In 1 v a, w E Hi g Zwwallli Z11 AL ems-'1) STATES- P' TEN' OFFWE? roams .1 Home, or n My invention relates to pressure-fluid mo tors. a

It has for-its'object to provide an improved ressure' fluid motor,- A- further object of my 6 invention is to. provide an improved'om-s bined driving and speed reducing mechanism which is adapted deliver the power required atthe desired speed. A still further object of m invention i to provide arrim 19- proved com ined motor and speed reduction mechanism wherein oneor more elements of the motor" act simultaneouly as elements'of the speed, reduction. mechanism. and thereby enable a compact and powerful unit to be provided adaptedto a wide range of usefu purposes. These and other objects and advan-' tages' of-iny improved construction will, however, hereinafter more fully appear. In. the accompanying drawings I have shown for u'rposesof illustration one em bodiment w ich my invention may assume in practice. a

In thesedrawi-ngs Fig.. 1 is a side elevation of my improved motor,.a.portion of the casing being broken away to show the rotors I Fig. 2 is a central vertical longitudihallseo- 'tion of the construction shown-in Fig. 1. 4

Fig. 3- is a transverse sectional view taken so on line 3-3 of'Fig. 2.

' Fig. 4 isa similar transverse sectional view taken on line.4--4 of Fig. 2. A

- In "this illustrativev construction l have shown a motor of the pressurefluid type en--' closedin asuitable casing 1 and adapted to Y be driven by an suitable pressure fluid, herein air, recervab e through a suitable inlet, asp 4 2,- andoper'atively connected to rotate'an desired element, herein shown for examp e as' 1 0 .a pulleys.

S In.my improved constructionitwill be ob,- P

served that the casing 1 has a suitable rotor housing chamber '4 formed therein. This chamber, as shown, alsohasfi red therein at 4 one end, as by a'suitablespline 5, an internal gear 6 having spirally disposed teeth :7 adaptd tomesh witheooperating spiral teeth 8 formedon the outerperiphery of a rotor 9 \which, as shown, is journaled on an eccentric 10. As illustrated, this eccentric IO'also carries'v a {1011 'tudinally spacedcoaxially disp'osed' sma er rotor 11,- preferably rotatable with, havin mom, new mam; assronon 'ro 01mm,; eoaroaarxon or "-rnom ilo'rom 101a; term Io. 848475.: 18mm 0mmsi, 1921. mm in. his.

' with the rotor 9 and herein integral'fthere p a smaller number of teeth 12 thereon similar to the teeth 8 and meshingvqithcorresponding teeth 13 on the inner periphery of an internally toothed gear- 14. Here. it will also be noted that intermediate, rota longltudinally spaced fluid pressure. supp ingamembers 15 and .16, herein integrally united, are disposed between the rotor 9.an d thegear .6, and between the rotor 11 and the gea 13. Herein, it will also be noted that these embers 15 and 16 are of substantially. crescent shaped crosssection so that they substantially fill the interval between their respective rotors-and gears. It will also noted that the same are attached, respectively, head members 17 'and 18, the member 17- 'in a preferred form being integral with the member 15, while the member 18 is removably attached to the member 16 by any suitable-means, such as one or more screws 19'. These head members 17 and 18, as shown herein, in turn each also serve toclose or seal the ends of oneset ofspiral teeth. -As shown, one of the same, i. e.- the member 17, is provided with a sleeve 20 journaled in suitable-bearings 21 formed in one end of the casing 1, while; the other is provided with a sleeve 22 H'ournaled in a. suitable bearing 23 formed in the sleeve 24, which last is secured, by a spline 24, on the gear 14, journaled in bearings 25 at the opposite end of the casing and having the rotated element, herein the pulley 3, rotatable therewith. At- ,tention eccentriclOis provided on its with sleeves 2Q an the sleeve 20 herein provi d passage opposite ends d 22. It will'also be noted that and the members 15 and 16 are 28 communicating: through a lateral port 29 and a suitably pjacked annular. passage 30, with the inlet 2, and through cooperating lateral passages 31 and 32-with the tip of each the: fluid is discharged between the teeth on the adjacent elements 9, 6, and 11, 14. As shown, it will be notedthat a single exhaust is also directed to the factthat the coaxial stub shafts 26 keyed at 27 to thethe sleeve 24 in turn being ded with a longitudinally disof. the members 15 and-16, so that pipe 33 is also prdvided intermediate the ends of the casing 1 to conduct away the exhaust from both ends of the motor.

provide for lubricating the parts, it will also In order to be observed that a suitable oil cup 34 is provided for'the bearing'21, and that a corresponding oil cup 35 is provided for the bear- -ings 25 and 23, thelatter oil cup communicat ing with these" hearings through suitable reg- 15 'caping from the-chamber 4 maypass to the i latter groove and out through passage 42 formed in the'ca'sing.

- In the operation of my improved construction, it willbe observed that when a'suitable pressure fluid, such, for example, as air, is supplied through the supply pipe -2, the same :enters'the annular passa e 30,- and from the latter-is delivered through the lateral p.ort,29 continuously into the longitudinal passage 28. From .this passage 28 the fluid issupipliedthrough the lateral passages 31'and 32 to the tips of the members 15 and16. Here, 'we will first consider the actiornof thepressure fluid in the larger of the elements, i. e. in that including the larger rotor 9. Oh-

viously, due to the'factthat the internal gear 6 is fixed, the pressure fluid passing into the space between the spiral teeth 7 and 8, will cause the rotor 9 to be rotated clockwise.' as

35 shown in Fig. 3, relative to the teeth 7. Ob-

viously, during this movement the member 15 will rotate'in an opposite direction to the a registering member 9 and with the eccentric'lO to which it is fixed, will move in a' counter-clockwise 40 direction. In other words, itwill be observedthat'as pressure fluidis supplied through the passage 31' rotation will be ,im arted to the rotor 9, and the supply means-delivering the pressure fluid thereto will rotate therewith in such a manner that a constant supply'of fluid is delivered to the teeth as the rotor 'moves' about the inner periphery of the internal gear'6'. Obviously, due to the supply of pressure 'flu-id through the passage 32, a

in the smaller element, i; e. that includingthe smaller rotor 11. -However, since the outer gear 14 is not fixed but is in-' stead freeto rotate, it will be noted that this 5 .gear will rotate relative to the rotor. The rotation of thejgear 14 will of course beat a the formula: .14s velocity co equals the product of the ,velqcity of the ec-: centric 10x 1 wher-fqaal -thenumher of teeth ongear number of illustration only} Letters Patentis:--' i 1. ln wmbination, a. compound epicyclic of'teethon I ,whilethe elements of the compound gearing herein shown act as driving" elements, "the same also simultaneously act as a compound gear reduction operating upon the principle of'a compound e icyclic trainutilizing two internal gearsQ twill of course be evident that this operation will continue as long as pressure fluid is supplied from the inlet 2, and that the exhaust from the two will pass out of the chamber 4 into the com- 7 mon exhaust pipe 33.' It will also be evident that during the operation of my -improved mechanism, oil will be supplied from the oil cups to the bearings and that the air from the l'.

chamber 4 will be prevented from blo'wing I out the oil at one action bf-my improved means-39,40 and 41 above described. a

' In the use of my improved motor, it'will be [evident that a very wide variation in reducsets of rotors v end ofthe' casing, due to the f tionmay be obtained by 'a simple variation in. a

' the number of teeth employe ,'the rotors 9 and 11-, or' the gears 6 and'14. In practice, it has been found that any desired reduction may be obtained ranging on hundred or more to one.

either side of two Thus, obviously, any desired speed of rotation of the/sleeve 24 and theiillustrative rotated element 3 may be obtained enabling my 4 improved combined driving and reduction upon. either of i mechanism to be adapted to a wide range of uses. It will ,further 7 be observed that through my improvedconstruction wherein the drivingand reducing mechanism are range of uses..-

formed in one and cooperate simultaneously e to produce an exceedingly compact con- 1 struction which readily lends itself to a wide- Attention isalso directed to.

the fact that elementsof any desired power or of ferent numbers of teeth, and that if desired the principle of. my invention may be embodied in a single driving rotor; as distinguished from the plural driving rotors desize may be readily provided utilizing gears different sizes .or gears having dif-- scribed ,in this illustrative constructiom These and other advantages of my 1m roved construction will, however, be clear y apparent ,to those skilled-in the art. While I havein this application specifically described one emboiliment which my invenpractice, it will be undertion may assume in V I and that. the invention may be modified'an embodied in various other forms without depart-in from the spirit or scope of the appended What I claim as new and desire to secure by terna spect to'each other, means cooperating with of intermeshin I .with the teeth 0 the gears of each pair to form .mbtive fluid to a gear reduction including a plurality of pairs 7. In combination, a compound epicyclic gears, means cooperating internal gear train, and means 'for supplying plurality of the rotors there pressure fluid receiving pockets increasing in of. volume on relative movement between said I gears, andmeans for supplyin motive'fluid to internal gear train having s iralteeth, and the pockets formed between t e teeth of each mean-s for supplying motive uid to a plural-.

air; g ity of the rotors thereof.

2. In combination, a com ound epicyclic 9. In combination, a gear reduction includgear reduction includin a p urality of pairs ing a fixed internal gear and an eccentrically of intermeshing gears avmg posed teeth, means cooperating with the teeth fluid supply means rotatable relative to said of the gears of each pair to form pressure fluid rotor for supplying fluid to the teeth thereof. receiving pockets increasing in volume'on 1'0. Apressure fluid motor comprising com relative movement between said ears, and bined motorand reduction compound gearing valveless means iorsupplying'motive fluid to units, and pressure fluid connections therefor the pockets formed between the teeth of each comprising siipply and exhaust connections to pairs. each of said units.

. '3. In combination, a compound epicyclic- 11. Iii combination, compound reduction gear reduction including a 'pluralityo'f pairs gearing including a fixed internal gear and a 8. In combination, a compound epicyclic 7o helically dismounted rotor meshing therewith, and motive v of intermeshing gears, one of the gears of each pair being an internal ear and said ingears belngcoaxially isposed with rethe teeth of each pair to iorm pressure fluid receiving pockets increasing in volume on relative movement .between said gears, and

. means for supplying motive fluid to the pock- [of intermeshing gears ing an internal ets formed between the teeth of each pair. i 4. In combination, a, compound epicyclie gearreduction including, a plura ity,o pairs aving helicallyedi'sposed teeth, one of thegearsof each pair beear and said internal gears being coaxially (Iisposedwith resplect to each other, means cooperating with t e teeth of f each pair to form pressure fluid receiving pockets increasin in volume on relative -move-' ment between sai ears, andvalvelessmeans for s'upplying' motive fluid to the pockets formed betweenthe teethof each pair.

. .5. In combination-,acom ound epicyclic. gear reduction including a p urality of pairs of intermeshim gears, corresponding ears offluid to the pockets formed between the teeth of each pair. L

each air being '.coaxial withjeach ot er and tw'oo said corresponding gears moving orbitgearing including a fixed internal-g r and a no I ally and rotatin at equiangula'r rates, means cooperating with the ,teeth of .each pair toform pressure fluid receiving pockets increasing in volume on relative movement between I the gears, and means for supplying'motive.

6. In combination-,racompouiid reductibn gearing including a fixed internal gear and "a rotatable internal gear-and coaxlal rotors meshing respectively with said fixed andtwith said-rotatable internal ears, means cooperating with the'teeth of t e gears to form pressure fluidreceiving-pocketsincreasing in volume on relativemovementbetween the gears,

and means for supplyingmotive fluid to the pockets termed between the teeth of each pairof meshinggear's.

rotatable internal gear and a plurality of rotors meshing therewith, and means for supplying motive fluid to the meshing teeth ofv I each of saidrotors and its gear. 12. In combination, compound reduction mechanism comprising a plurality tof elements, means for supp ying motive fluid between the teethmf eac of said elements, and

means for sealing one end of the teeth of each I of said elements.

13. In combination, compound reductionmechanism comprising a plurality of elev ments, means for supplying motive fluid between the teeth of each of said elements,-mean s for sealing one end of the teeth of each of said elements, and a -siingle means for conducting awaythe exhaust from each of said elements.

14. In combination, coinpound reduction gearing includinga fixed internal gear and A plying motive fluid to the meshing teeth of g each of said rotors and its gearr 15. In combination, compound reduction rotatableinternal gear and a plurality of rotors meshing'therewith, an eccentric carry mg'each of said rotors, and means for su plying fluid parallel to the axisof one ofsald rotorsandlaterally to'the teeth thereof.

'16..In combinat on, a casing, an internal gear fixed therein, an internal gear rotatable therein, simultandbusly rotatable rotors meshing with said gears, an' eccentric on.

which said rotors are rotatably mounted, and

fluid supply means fixed to said eccentric and having a portion disposed between each r0- 'r andsupplying fluid tethe -tor and'its teeth of eac rotor. 1

17; A pressure fluid: motor comprising substantiall coaxiallyiarranged sets of motorand uct ion gearing, one including a fixed gearand the other a rotatable gear and I each including cooperating rotating gearing,

and meansffor supplying pressure fluid to and exhausting the same from each of said sets.*

A 18. A pressure fluid motdr comprising cooperatingsets of substantially coaxially disposed :combined motorand reduction gearing," a casing enclosing said gearing and forming a ournal therefor, means for supplying pressure fluid to 'oneof said sets of gearing, means for exhausting'pressure fluid therefrom through said" casing means for supplying lubricant to said gearing, and means for sealing one end of said casing against the discharge of lubricant while ermitting the escape of, exhaust pressure uid therethrough.

19. In combination, a circular rotatable power driven member and I driving means therefor comprising intermeshing' toothed rotatable driving membersone of which rotates upon a fixed axis andthe other of which rotates upon an axis which travels around said first mentioned axis, andmeans for conducting motive fluid to said drivin members and exhausting it therefrom inc uding an.

admission port: constantly communicating I with the teeth of said driving membersadjacent their line of mesh.

' 20. In combination, adriven member, and driving means therefor compris ng cooperat-- ing members constituting a motor, one of g said members rotating in the same direction and at the same angular speed as said driven member,. and. means for supplying motive fluid to'the space between said-,membersv to effect operation of said motor,'said last mentionedvmeans including; a continuously act-,- ing fluid pressure supply port rotating about the axis of rotation of said driven member. 21. .In combination, a driven member, and.-

- driving meanstherefor-comprising cooper at ng members constituting a motor, one of tatable powertransmission: member having a gear attached thereto'which is operative on said members being rigidly corinectedto said driven memberand'rotating therewith, and, 4

means for supplying motive fluid to the space between saidimembers to efiect operation of said motor, including port means whose. orifice bears a fixed space relation to a plane including thejaxes' of said members, the-pe riphera'l and angular speeds of'one of said members cooperating to constitute a motor icing greater than those of said driven meme er. 22. In a-fluid pressure motor, acircular rorotation to rotate said circular member, a

, its axis' moves around the axis of said first second gear meshing with saidfirst men: tioned gear and traversing-an-orbit such'that mentidned gear, means for supplying'fluid pressure to said gearsto efiect relative rota-,1

tion'thereof, and means including a-stationof, revolution.

ary member and a member cooperating therewith and rotatable on rotation of one of said first mentioned ears to eifect rotation of said annular mem the product of the rate of rotation of said second mentioned gear andthe ratio of the mentioned.

'23. In combination, a' rotatable 'power driven. member circular in 'CI'OSSsBtlOn, and driving means therefor comprising cooperating intermeshing toothed members, one of which rotates uponits axis and simultaneously traverses a path such that its axis traces a surface of revolution surrounding the axis of said rotatable member, gearing connecting said last mentioned toothed member in driv ing relation with said power driven member, and means for supplying motive fluid to and' exhausting it from said toothed'members, said motive fluid supplying means including a port openin adj acentthe mesh line between said toothe members; through which motive fluid is constantly supplied during their rotation, v

' 24. In combination, a rotatable power driven-membercircular in cross section, and driving means therefor comprising cooperate r at ,arate -less than teeth of the second mentioned gear to the first ing interme'shing toothed-.members, one of i which zrotateslupon' its. axis and simultaneously traverses a path such that its axis traces a surface of revolution surround ng.

the axis of said rotatable member, gearing connecting, said last mentioned toothed mem ber in driving relation w th said power driven :member, including a pinionrotatable coaxially with and at the same angular-speed as said toothed memb'er,,-.and means for supplying motive fluid to and exhausting it from said toothed member, said motive fluid supsaid toothed member to efl'ect rotation of said power driven member including a fixed gear v and a gear meshing therewith and movable bodily about the axis of rotation of'said power driven member-pt an angular speed equal to toe angular speed of movement of the axis of said toothed. member in tracing said surface --'me'mb,er, and means for causing rotation of 26. In combination, a combined valveless motor and gear reduction including a fixed internal gear and a meshing rotatable-ele- 1,689,,581 -5 ment, and me ans for supplying motive'fluid otor and gear redugti'on including a; fixed tothe meshin teeth thereoi. V I 27. Incom inati'on', a. combined valvelegs rotor meshing therewith and motiv fluid motor and gear" reduction including a. fixed supply means supplying iiuid'to the meshihg li-internal ear-and a meshing .xqta-table 'ele'i teeth'thex eof. I I L ment, on means for constantly. supplying In testimony whereo I gflixmysignature. motivefluid to the'meshing-teoththereof. I Y o 28.11; oombingtiom'o oombinod w lveles MORRIS P. HOLMES..-

internal gear and. an eccentncally mo had 10 

